The British Library is conveniently located near the Kings Cross Railway Station and Euston and so is a popular place to visit for those of us with some time to spend while waiting for the Eurostar or a train north to Scotland. So, I was very interested to hear about the planned expansion of the exhibition space. Then I found the webpage that explains a bit more about what they are doing and the plans. There is a long video here.
If you've never been, do go. The exhibits were fascinating and you can easily while a way an hour or two exploring them. You can see what's available now here.
When I visited there was a great exhibit on Henry VIII. What have other seen?